Regioselective Synthesis of Difluorinated <i>C</i>-Furanosides Involving a Debenzylative Cycloetherification
作者:Julien A. Delbrouck、Valentin N. Bochatay、Abdellatif Tikad、Stéphane P. Vincent
DOI:10.1021/acs.orglett.9b01878
日期:2019.7.19
A highly regioselective synthesis of valuable gem-difluorinated C-furanosides from unprotected aldoses via a debenzylative cycloetherification (DBCE) reaction induced by diethylaminosulfur trifluoride is descibed. The scope and limitations of this DBCE reaction are described using a series of commercially available pentoses and hexoses to afford, without selective protection/deprotection sequences
Efficient and regioselective synthesis of γ-lactone glycosides through a novel debenzylative cyclization reaction
作者:Julien A. Delbrouck、Abdellatif Tikad、Stéphane P. Vincent
DOI:10.1039/c8cc05523h
日期:——
glycosides is reported from unprotected aldoses through a new debenzylative lactonization (DBL) reaction. The scope and limitations of this DBL reaction are described starting from a series of commercially available hexoses (L-fucose, D-galactose, D-glucose) and pentoses (D-arabinose, D-ribose, D-lyxose, D-xylose) to afford the corresponding γ-lactones in good yields and without concomitant δ-lactone formation